Journal of Lanzhou University of Technology ›› 2025, Vol. 51 ›› Issue (2): 65-70.

• Chemical Industry and Light Industry • Previous Articles     Next Articles

Biomass porous carbon adsorbs double dye molecules to enhance electrochemical performance

MA Ji, XU Hui, BAO Yuan-hai, ZUO Sha-sha, KANG Kai-yue   

  1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2023-09-11 Online:2025-04-28 Published:2025-04-29

Abstract: Ginkgo leaf-derived porous carbon (KGL) was used to simultaneously adsorb azo dye carmine (AR) and anthraquinone dye alizarin red S (ARS). The combination of active dye molecules and porous carbon materials exerted good redox activity. Compared with the adsorption of a single dye, the carbon material adsorbed with double dye molecules has more redox active sites, with both dye molecules simultaneously exhibiting pseudocapacitance characteristics. At a current density of 1 A·g-1, the optimized composite electrode material (KGL/AR-ARS-5) exhibits a specific capacitance of 811.3 F·g-1. The energy density of asymmetric capacitor assembled with KGL as negative electrode and KGL/AR-ARS-5 as positive electrode can reach 15.4 Wh·kg-1 at power density of 700 W·kg-1.

Key words: biomass porous carbon, alizarin red S, carmine, electrosorption, specific capacitance

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